When you open Software Update from the Apple Menu (top left) there is a button 'Show Details' on the lower left of the window, click that and it will open, showing all the updates. untick those you don't want and then click 'Install'.
What I miss is the ability to Download and Keep, and Download, Install and Keep, that existed in Tiger - for those of us with more than one Mac this is tedious, we have to go to Apple Downloads and find each and every recommended update
